Sublimation apparatus.



J. D. SARTAKOFF.

SUBLIMATION APPARATUS.

APPLICATION man APR. 13. um.

Patented Nov. 12, 1918.

JACK D. SARTAKOFF, OF NEW YORK, N. Y.

SUBLIMATION APPARATUS.

Specification of Letters Patent.

Patented Nov. 12, 1918.

Application filed April 13, 1917. Serial No. 161,731.

In all whom. it may concern:

Be it known that I, ACK I). SARTAKOFF, a citizen of Russia, lQSl( mg in the city of New York, borougl'i of lllanhattan, county and State of New York, have invented a certain new and useful Sublimation Apparatus, of which the following is a specification.

his invention is an apparatus for subliming such substances as salicylic acid, beuzoic acid, sulfur, iodin, etc, for the purpose of refining or purifying the same in an expeditious, thorough and economical manner.

Speaking generally, the invention embodies a revolving drum or chamber into which the material to be sublimed is fed, said drum being provided, interiorly, with lifts or elevators, whereby the material to be sublimed is thoroughly agitated in order to uniformly expose it to the heating agent, in combinat1on with means for preheating the material to be sublimed and a receiver or condensing chamber for the sublimed material. The heating agent employed may be either hot air or preheated strain, and it is introduced into the revolving drum by means of a per forated pipe running longitudinally of the drum, means being employed for filtering); or straining the air or steam upon its escape from the condensing chamber, in order to completely free it from the sublimed product.

In the preferred emlmdiment of the in vention the material to be sublimed is continuously fed, automatically, to the revolving sublimation chamber, and the sublimed product is continuously withdrawn from the receiving chamber, thereby rendering the apparatus exceptionally economical in op eration.

The accompanyiup drawing illustrates the preferrerh.practical embodiment of the invention, but the construction shown therein is illustrative. only, and not exclusive of the forms in which the invention, or some of the features thereof, may be embodied.

Referring to the drawing, Figure 1 is a transverse section, partly in elevation, of the complete apparatus, and

Fig. 2 is a section on the line 22 of the revolving drum.

The letter A designates the, revolving drum or sublimation chamber, the same being preferably provided with two pairs of circumferential rings a a and a a. respectively, each pair of rings being provided with cooperating channels forming a raceway, for ball-bearings, b b, the outer ring being provided with supporting legs (2 0, respectively. Sweated or otherwise fixedly secured to a portion of the drum is a gear (I, driven by a pinion (2, whereby the drum A is rotated. The drum A is provided on its inner surface with lifts or elevators f, whereby, upon the drum being rotated, the material is elevated to the t p of the drum and thereupon is showered downwardly, thereby keeping it thoroughly agitated and enabling it to be uniformly exposed to the heating agent, such as superheated steam or air, introduced interiorly of the drum.

The heating agent is introduced into the drum by means of a fixed pipe g, extending from a heater or superheater, shown in the form of'a coil B, which is kept hot by means of a gas heater 0, said coil, in the event hot air is employed as the heating agent, being supplied with a forced current of air by means of a blower or fan D. If it is desired to use superheated steam as the heating agent, the steam may be introduced into coil B through a steam )ipe ii provided with valve '5', the fan D emg discontinued in the meantime and the valve 7' closed, unless it is desired to employ a mixture of heated air and superheated steam, in which event thc fan I) is operated and the valve kept open simultaneously with the introduction of steam through pipe The portion of pipe g which extends within the drum is perforated, as shown at h, whereby the heat ed air or superheated steam is thoroughly distributed within the drum and brought into intimate and-uniform contact with the mate ial to besublimed, as the latter falls in the form of a shower from the top of the drum to the bottom thereof.

In order to provide a sufficiently tight joint or stuflin box at the point of entrance of the pipe 9 into drum A, a ring of suitable packing material is, provided with a flange k, is aflixed to pipe 9 with its flange pressing against the inner wall of the end veyer H operated through the medium of a member I. of the drum A. This ring repulley n. mains stationary while a coiipelating pack- From the foregoing description of the ing ring 171 is attached to the outside of end apparatus, its operation Will be readily unineuiber l and concentric with the ring it, derstood, but it may be described, briefly, and so positioned with relation thereto as to as follows: The material to be sublimed, revolve thermm when the drum A is roe. g., crude salicylic acid, is introduced into tated. hopper F, from which it is fed to drum A The opposite end of drum A is preferby means of the worm-conveyor Q. In its ably tapered, as shown, and is provided with assage from the worm-conveyor, it may packing ring n which rotates with the drum he raised to any desired temperature, say and coiipcrates with another packing ring 0 120 C. by means of the oilbath in which aflixed to the receiving or condensing chamthe casing of the conveyer is submerged. ber E. -The reheated raw material having been The raw material to be sublimed, such as intro uced into drum A, it is elevated and crude salicylic acid, is introduced into a allowed to fall in the form of a shower '80 hopper F from which it is fed to drum A through the medium of the elevators or through a casing p by means of a wormpockets f. {is the material falls through conveyer q operated throu h the medium the casing, it meets the current of heated of a pulley 1', thereby provi ing, if desired, air or preheated steam or mixture thereof a continuous feed or supply of raw material as circumstances require, introduced through to the drum or sublimation chamber. It is the p rf ra i ns of pipe g, and becomes generally deemed advisable to preheat the thoroughly commingled therewith and heatmaterial operated upon prior to its introed to such temperature as to be vaporized, duction into drum A, in order not to reduce and, In con]unct1on, with the gaseous curthe temperature within the drum, and this rent, passes around the bellies u and u, out may be accomplished by surrounding the 9f the drum into the c densing 0} receivcasing 70 of the worm-conveyor with a chamn chamber E, wherein the vaporized maber 8; in which is kept a supply of oil a, terial is deposited, and may be removed thereby constituting an oil bath, which lat- @herefmm, as required, through the travelter maybe heat-ed in any suitable way, as by g n y r Win18 the Mr r stem, a gas h t G freedof vapor escapes through the burlap The interior of drum A is preferably rocovering Z. The temperature within the vided with an inclined baflie member u, havdrum W ha p a fr m 150 C. to 200 ing an opening-u, and a coiiperating vertical 6-, and t e drum is slowly lQ PY at bathe o secured to the perforated portion of the mtfi f about 6 r p qn P h h pipe 7. whereby the gaseous fluid and sub- T temperature at Wh ch the raw material limed agent which it carries is caused to take Feheated as as th hh a circuitous path, thereby facilitating the f the m, and also h s temperatylre separation and retention within the drum of m the cohdehsmg chamber, W 1V with any heavy impurities which might be picked the mammal treated h h ffi? are factors up by the current of gaseous fluid. The khowhto those Sklhfld h and d A may be id i h an i l t i w ll be modified to meet the particular core to for introducing water or other washing (11mm? of p agent into the drum for cleansing the same, It W111, he llhderstood that ig Changes and suitable manholes a: for removing the and modlfihatlohs m y he made'lh the PP wash-water or residues from the drum. l descnbed, WZ P ph g from the The sublimed material escapes from the S of the mvhhtlohii ahdfihhh Parts of tapered end of drum A into the condensing t Mg may he used: wlthoht y chamber E, provided with a cooling jacket h of the features 9 h I a" which may be Suppued with a cooling sire it to be understood that the invent on 11aor refrigerating agent. through pipe f is as broadly novel as is commensurate with which cooling agent finds an exit through the pp chhmspipe h, thereby providing means for keep- Hhvlhg thus h y descrlhed e ing the condenser or receiving chamber E what I claim as hh deshe m at any desired temperature. The top of Secure y q i i chamber F is closed by a suitable fabric 1', 1. In a sublimation apparatus, a revolu- I such as burlap, which permits the escape h fl l m r pp y uz a {58580118 of the air or other heating agent but preh g g t 'mterl rly 1 thereof whereby vents the escape of the subhmed product. the t mperature of the whole chamber IS The sublimed product accumulates in the maintained substantially pniform, means for condensing or separating chamber E- and heating said agent exteriorly of the drum, may be drawn off therefrom continuously a plurality of elevators interiorly of the or intermittently by means of a worm-condrum. means for mechanically feeding solid material to the drum. and means for em!- dcnsing and collectin from the drum.

in a sublimation apparatus. a revoluble drum. means for supplying a heating agent interiorly thereof. a plurality of ele- \tlims interiorly of the drum. a battle plate within the drum. means for meelianieally feeding solid material to the drum. and means tor condensing and eollerting the Vapors e caping from the drum.

3. in a sublimation apparatus. a revolubte drum. a plurality of elcvatim; bucket. ctu'iperatiing with the inner wall of the drum. wlu-reby. when the latter is rotated. the material contained therein is iii-st elerated and thereafter dropped to the bottom of the drum. a perforated pipe extending lonuitmlinaltr f the drum t'or introducing a gaseous heating agent therein. means for heating said agent exteriorly of the drum. and means for continuously feeding solid material to the drum. in combination with a separating or condensing ehauiber for the vapors escaping: from the drum.

l. in a sublimation apparatus. a revoluble drum. means for agitating material therein. means for heating said material directly by a gaseous agent. means for compelling the gaseous heating agent to traverse a tortuou path in its passage through the drum. means for continuously feedinrsolid material to the drum. and means for heating said material prior to its entry into the drum.

5. In a sublimation apparatus, a revolnble drum. a plurality of elevatin buckets so cured to the inner wall of the drum and extending longitudinally thereof. means for introducing a gaseous heating agent Within the drum. a plurality of baflle plat as Within the drum for directing said gaseous heating agent in a circuitous path. and means for automatically t'eeding solid. material to the drum..in coml'iination with a receiving or condensing chamber provided with filtering or straining means which permits the gaseous agent to escape but precludes the escape of the vapors carried thereby.

(S. In a sublimation apparatus. a sublimation chamber. means for agitating material therein. means for introducing a. gaseons heating, agent into the hamber. and a heater connected with said means. in eombination with means for feeding solid material at one end of the chamber. and a receiving or condensing chamber wherein the suhlimed product is deposited. said condensing chamber being positioned at the outlet of the suhlimation chamber opposite the end at which the solid material is introduced.

7. In a sublimation apparatus. a sublimatifln chamber. means for agitating material the ,apols escaping; heating agent to therein. means for supplying a gaseous the means for heating said gaseous agent exteriorly ot the chamber. means for eontin'uously feeding solid material to the chamber. and means for heatin," said supply means whereby the material is preheated prior to its introductitm into the chamber. in combination with a condensing chamber for receiving the sublimed vapors. said condensing chamber being provided with littering means which permits the escape of the gaseous heating agent but precludes the escape of the vapors can ried thereby. and means for automatically drawing oil the sublimed material from the condensing. chamber,

in a suljilimation apparatus. the eombination of a revolnble drum. means for elevziting the material within the drum and depositing it in the form of a shower. a perforated pipe for supplying heated air to the drum. a heater connected with said pipe. a blower for supplying a current of air to the blower. means for continuously feeding solid material to the drum. means for preheating: said material prior to its introduotron into the drum. :1 receiver or condenser wherein the vapors escaping from the drum are condensed. and means for cooling the vapors within the condenser.

9. In a sublimation a 'iparatus. a rotary drum. one end of which is substantially closed and the other end of which is provided with a tapering portion. a. perforated pipe extending loneitmlinally of the drum for introducing a gaseous heating agent therein. means for supplying a gaseous heating agent to the said perforated pipe. means for feeding solid material to the drum and near the closed end thereof. means for heating said material prior to its introduction into the drum. in combination with means. connected with the tapered portion of the drum. For windensin; the vapors which escape from the drum.

It). In a sublimation app'vatus. a rotary drum. means for supplying a. gaseous heating agent. to the drum. interiorly thereof. and forcing: it to traverse a ircuitous path. means for feeding solid material to one end of the. drum. means for drawing off and condensing: the vapors attire opposite end of the drum. and means agitating the solid material within the drum.

11. in a sublimation apparatus. a rotary sublimation chamber. means for rotating same. means for feeding solid material near one end of the chamber. means for intro during a gaseous heating agent within the chamber and throughout. its entire length. means for agitating the solid material Within the, chamber. and means for introducing a. liquid into the chamber. and cooperating bafi'le plates for forcing the heating agent and vapors produced to traverse a circuitous path in then assage through the chamber. 12. In a su limation apparatus, a rotary sublimation chamber, a plurality of liftin buckets associated with the inner Wall 0 the chamber, for elevating and dumping material Within the chamber, means for feeding solid material t0 one end of the chamber, a perforated pipe for introducing g gaseous heating agent into the chamber, 10

e plates positionedconcentrically with said pipe, and a tapering vapor exit from the chamber, and a condensing chamber con nected with said exit.

In testimony whereof I have signed my 16 name to this specification.

JACK D. SARTAKOFF. 

